Pi I2S Audio Control Register
From SpecNext official Wiki
| Number | $A2 |
|---|---|
| Readable | Yes |
| Writable | Yes |
| Short Description | Pi I2S controls |
| Bit | Description |
|---|---|
| 7-6 | I2S enable (soft reset = %00)
%00 = off %01 = I2S is mono source right %10 = I2S is mono source left %11 = I2S is stereo |
| 5 | Reserved, must be 0 |
| 4 | 0 PCM_DOUT to Pi, PCM_DIN from Pi (Pi hats) (soft reset = 0)
1 PCM_DOUT from Pi, PCM_DIN to Pi (Pi) |
| 3 | Mute left side (soft reset = 0) |
| 2 | Mute right side (soft reset = 0) |
| 1 | Slave mode (PCM_CLK, PCM_FS supplied externally) (soft reset = 0) |
| 0 | Direct I2S audio to EAR on ULA Control Port ($xxFE / 254) (soft reset = 0) |
(note: Next registers with number higher than $7F are inaccessible from Copper code)